07-22
Trouble shooting 20
INDOOR UNIT
OUTDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
Outdoor unit computer
communication error
Outdoor Unit Main PCB Circuit
When it cannot receive an effective signal for 10sec between
the Main CPU and Sub CPU in outdoor unit.
1. Main PCB failure
Check Point 1 : Replace Main PCB
Change Main PCB.
Outdoor Unit : No indication
ERROR CODE : E : 1c
Outdoor Unit : No indication
ERROR CODE : E : 20
Trouble shooting 21
INDOOR UNIT
INDOOR UNIT Error Method:
Indicate or Display:
Detective Actuators:
Detective details:
Forecast of Cause :
OKOK
Indoor manual auto switch error
Indoor Unit Controller PCB Circuit
Forced auto switch
When the Forced auto switch becomes ON for 30 consecutive seconds.
1. Forced auto switch failure 2.Controller PCB failure
Check Point 1 : Check the Forced auto switch
Check if Forced auto switch is kept pressed.
Check Point 2 : Replace Controller PCB
If Check Point 1 do not improve the symptom, change Controller PCB.
Check ON/OFF switching operation by using a meter.
>>If Forced auto switch is detective, replace it.
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